Attachment for scraper



Aug. 4, 1959 D. w. HILLS ET AL ATTACHMENT FOR SCRAPER Filed 001;. 29, 1957 INVENTORS DONALD W H/LLS OL/VER K GR/MM ATTORNEY United States Patent ATTACHlVIENT FOR SCRAPER Donald w. Hills and Oliver K. Grimm, Menlo Park, Calif., assignors to Hipp Weldin Works, Palo Alto, Calif.

Application October 29, 1957, Serial No. 693,176

4 Claims. (Cl. 37-145) This invention relates to a scraper intended for scraping, scarifying, leveling and the like. More particularly this invention is directed to a keeper member intended to lock scarifier members in place on a scraper of the type described and claimed in Hipp US. Patent No. 2,774,155, granted December 18, 1956, entitled Combined Scraper, Bulldozer and Scarifier.

In connection with a scraper of the type described and claimed in the aforesaidHipp patent, it is necessary to mount scarifier members on the scraper when it is in: tended to use the device for scarifying and the like.

The scraper of the aforesaid Hipp patent is equipped with a cross beam which serves as a structural member and for other purposes as explained in the aforesaid patent, and which also serves as a mounting member for scarifier elements. However, the means employed to lock or secure the scarifier members in this cross beam is subject to certain disadvantages.

It is desirable to be able to mount and remove scarifier members quickly. It is also desirable to mount the scarifier members securely.

It is an object of the present invention to provide an improved means of mounting scarifier members on scrapers of the type described.

It is a further object of the invention to provide a keeper member which will efiectively lock scarifier members in a scraper of the character described, yet will permit mounting and demounting the scarifier members with ease.

These and other objects of the invention will be apparent from the enusing description and the appended claims.

One form of the invention is illustrated by way of example in the accompanying drawings, in which:

Figure 1 is a view, partly in side elevation and partly in vertical section, of the scraper device of the present invention hitched to a tractor.

Figure 2 is a view in front elevation of the scraper of Figure 1 shown, however, on a larger scale and with parts broken away to reveal interior construction.

Figure 3 is a fragmentary View in longitudinal section of the cross beam of the scraper of Figures 1 and 2 showing the manner in which the keeper member of the present invention is inserted and removed.

Figure 4 is a perspective view of the keeper member of the present invention.

Referring now to the drawings and preliminarily to Figure 1, the scraper of the present invention is there shown and is generally designated by the reference numeral 10. It is shown hitched to a tractor 11, one rear wheel of which is shown at 12. A self-leveling connection is shown at 13, such connection being of a well known type which is described in the aforesaid Hipp patent and which is used on the well known Ferguson tractor. The scraper is hitched to the connection 13 by an A-frame which is generally designated as 14. The A-frame 14 is described in more detail in the aforesaid Hipp patent.

7 members 28 securely in place.

2,897,615 Patented Aug. 4, 1959 19. Also fixed to the rear wall 16 on opposite sides ofthe bucket 15 are a pair of brackets 20, one of which is shown in Figure 1 and on which is hinged a back filling blade 25. p

A box-like cross beam 26 is provided which is welded at its ends to the side walls 17 The cross beam 26 serves functions which are explained in the aforesaid Hipp patent and it also servesas a support for scarifier members. Thus, the cross beam 26 is formed with upper and lower slots 27 which are arranged in vertically aligned pairs and are spaced longitudinally of the beam 26 as will more clearly appear from an inspection of Figure 2.

Referring now to Figures 1 and 2, a plurality of scarifier members 28 are provided, each of which is notched at 29. Two notches 29 are shown, but a greater or lesser number may be employed, as desired. A greater number of slots provides a greater degree of adjustability of the scarifier members. Each of the scarifier members 28 has a tapered end portion 30 which receives a steel boot 31, which is a removable, replaceable item and is of hardened steel construction because it is the wearing element of the scarifier member 28.

It will be apparent that the scarifier members 28 are mounted on the cross beam 26 by passing them through the slots 27 and by engaging one of the notches 29 of each scarifier member with the adjacent edge of the cross beam 26.

It is necessary, however, to clamp each of the scarifier In accomplishing this object it is desirable that the clamping or keeper means employed for the purpose be simple and inexpensive in its construction because it is an element which may be lost and will require frequent replacement. Also it is important that the keeper member lock the scarifier member 28 securely in place, and that it be easily inserted and easily removed. 7

To this end there is provided a keeper member which is generally designated by the reference numeral 32 and which is best shown in Figure 4. Referring to Figure 4 it will be seen that keeper member 32 comprises a horizontal head portion 33, a vertical body portion 34 and a horizontal tail portion 35. It Will also be seen that the portions 33, 34 and 35 are mutually perpendicular, the advantage of which will now be explained.

In mounting a scarifier member 28 it will be inserted through a pair of slots 27 and the appropriate notch 29 will be engaged as illustrated in Figure 1. Then the keeper member 32 will be inserted in the manner shown in Figure 3. That is to say, the tail portion 35 is inserted in the upper slot 27, the keeper member is then rotated from the position A shown in broken lines in Figure 3 through an intermediate position shown at B in Figure 3 to a vertical position C shown in solid lines in Figure 3.

It will be apparent that the head portion 33 and the tail portion 35 secure the keeper member 32 in position and prevent it from dropping or bouncing out. The body portion 34 acts as a wedge between the scarifier member 28 and the adjacent edge of the slot 27.

When it is desired to remove the scarifier member 28 it is merely necessary to lift up on the head portion 33 and, while lifting, to rotate the keeper member through the position B to the position A and then lift it out of the slot.

It will, therefore, be apparent that a scraper has been provided with a means for mounting scarifier members and securing the same in place against accidental removal,

as by agitation while the scraper passes over rough ground. The keeper member employed for the purpose is the essence of simplicity, it is very easily mounted and demounted, and it performs its keeping, securing or wedging function very satisfactorily.

'We claim: a

1. A scraper of the character described comprising a scraper member having a rear wall adapted to carry :a scraper blade, side members extending forwardly 'from opposite ends of the rear wall, a cross member extending between said side members forwardly ofthe rear wall, said cross member being formed with slots ,to slidably receive scarifier members, and a keeper member for each scarifier member, each such keeper member comprising mutually perpendicular head, body and tail portions, each said keeper member being insertable in' its slot adjacent a scarifier member and being also removable from said slot and detachable from the scraper.

2. A scraper of the character described comprising a scraper member having a rear wall adapted to carry a scraper blade, side members extending "forwardly from opposite ends of the rear wall, a cross member extending between said. side members forwardly of the rear wall,

said crossrnember being formed with slots to slidably receive scarifier members and a keeper member .for each scarifier member, each such keeper member comprising a massive bar having a mutually perpendicular head, body and tail portions,.said body portion being received within a slot and serving .as a wedge, said head and tail portions serving as keeper members, each said keeper member being insertable in its slot adjacent a scarifier member and being also removable from said slot and detachable from the scraper.

3. A scraper of the character described comprising a scrapermember having a rear wall adapted to carry a scraper blade, side membersextending forwardly from opposite ends of the rear wall, a cross member in the form of a hollow beam of square cross section and extending between said side members forwardly of the rear wall, said cross member being formed with slots to slidably receive scarifier members, and a keeper memberv for each scarifier member, each such keeper member comprising mutually perpendicular head, body and tail portions, said body portion being received within a slot and acting as a wedge, said head and tail portions acting as locking members, each said keeper member being insertable in its slot adjacent a scarifier member and being also removable from said slot and detachable from the scraper.

4. A scarifier comprising a frame adapted to be connected to a tractor and propelled thereby over the ground, a hollow metal beam supported by .said frame above ground level and transversely to the path of movement of the frame,said hollow beamhaving an upper surface and a lower surface, saidsurfaces.being'formed with aligned pairs of slots, one slot of each pair being formed in the upper surface and the. other slot being formed in the lower surface; said scarifier comprising also a plurality of scarifier members each having a body portion received in a pair of slots with part of the body portion projecting above the upper surface and part projecting below the lower surface, the :bodyportion ofeach scarifier member being formed with a notch inregistry with one of. the respective slots by meansof which. the scarifier member engages the metal of the .beam and is latched thereto, said scarifier member being, however, rockable to detach itand remove itfrom the beam; said scarifier also comprising a' keeper member for each scarifier member which is detachable from the beam, each said keeper member. having a body portion received within a slot and wedged; against the body of the respective scarifier memberto clampit tightly in place, a head portion perpendicular to .thebody-portion and a tail portion perpendicular to said body,por.tion and to said head portion, said head portion :being located above and said tail portion being located below: the respective slot whereby said keeper member'is restrained byits headand tail portions against verticalndisplacementbut can be removed from .and inserted inits slot by rotation.

References Cited in the file of this'patent UNITED STATES PATENTS 641,530 Mosher Jan. 16, 1900 807,342 Willmore et al Dec..-12, '1-905 1,133,884 Richardson Mar. 30, 1915 2,523,958 Knobel Sept.=26, .1950 2,774,155 Hipp' :Dec. 18, 1956 2,802,655 Davis etal Aug. 13, 1957 

